First responders at the scene of a crash on Route 12 in Volo on Dec. 23, 2019. (Joe Shuman / Chicago Tribune)

A Lake Zurich man who was killed in Volo this week in a three-vehicle crash after his vehicle crossed into oncoming traffic has been identified by the Lake County Coroner’s office.

In addition, a man charged for allegedly striking a squad car and seriously injuring an auxiliary sheriff’s deputy at the crash scene despite flares and traffic cones set up around the wreckage is scheduled to appear in bond court Monday for a status of attorney hearing on charges including aggravated DUI.

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On Thursday evening, Lake County Coroner Dr. Howard Cooper identified the driver killed in the initial crash as 82-year-old Leroy Radtke of Lake Zurich. Cooper said preliminary results of an autopsy Thursday determined that Radtke died of multiple injuries due to blunt force trauma from a car crash.

Routine toxicology reports are pending, Cooper said.

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On Friday, Lake County Sheriff’s Office spokesman Sgt. Christopher Covelli said that an auxiliary deputy, whose legs were badly injured when a squad car allegedly hit by a drunken driver slammed into him at the cash scene, has been released from the hospital.

Covelli added the auxiliary deputy is recovering, but "has a long road ahead of him” in terms of rehabilitation.

Wauconda Fire and Lake County Sheriffs Police investigate the scene of a fatal accident on Dec. 23, 2019. During the accident a Lake County Sheriff's Deputy was struck by a vehicle at a road block at Sullivan Lake Road and Route 12. (Joe Shuman / Chicago Tribune)

According to the sheriff’s office, a preliminary investigation determined that a 1995 Mazda convertible driven by Radtke was traveling southbound on Route 12 approaching Volo Village Road, when, for an unknown reason, it crossed into the northbound lanes of traffic.

The Mazda struck a northbound 2005 Toyota sedan, driven by a 20-year-old man from Lake in the Hills. That collision caused the Toyota “to rotate into the path” of a southbound Subaru SUV driven by a 27-year-old male of McHenry, according to the sheriff’s office, and the Subaru struck the Toyota.

Radtke was pronounced dead at the scene, authorities said, while the driver of the Toyota was transported to Advocate Condell Medical Center in Libertyville with serious injuries. The driver of the Subaru was uninjured, according to the sheriff’s office.

As the crash was being investigated at about 7 p.m. that night, Chris L. Miller, 65, of unincorporated Mundelein, driving a 2016 Ford Pickup truck southbound on Route 12, allegedly disregarded flares and traffic cones at the crash scene and plowed into a sheriff’s squad car, according to the sheriff’s office.

Chris L. Miller (Lake County Sheriffs Office / HANDOUT)

The collision caused the squad car to strike the auxiliary deputy, who was standing outside of the squad.

The deputy sustained serious leg injuries and was transported to a local hospital via ambulance, Covelli said.

Miller allegedly fled in his vehicle southbound from the scene, according to the sheriff’s office, until his truck became disabled, “likely due to its heavy damage,” in the area of Route 12 and North Fox Lake Road in Lakemoor.

Authorities said Miller was located, found to be driving under the influence of alcohol, and taken into custody by sheriff’s deputies.

The Lake County State’s Attorney’s Office approved charges for Miller including felony aggravated DUI involving an accident with injuries; leaving the scene of an accident with injuries; operation of a vehicle on approach of an emergency vehicle causing injuries; DUI; operating an uninsured vehicle; improper lane usage; failure to reduce speed to avoid an accident; failure to report an accident; and failure to give aid following an accident.

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The investigation into the crash continues by the Lake County Sheriff’s Office Technical Crash Investigations Unit and the Lake County Coroner’s Office.